Paper bag.



Patented Jan. I, l90l.

F. TYSDN.

PAPER BAG.

(Application filed Aug. 25, 1900.;

(No Model.)

7756169551= 1654, Z. {ma-44w FFICE.

1' ATENT FRANK TYSON, OF PHILADELPHIA, PENNSYLVANIA, ASS IGNOR OF THREE- FOURTHS TO ROBERT W. RUTHERFORD AND JOHN R. OKELL, OF SAME PLACE, AND JAMES G. LOWDON, OF ABILENE, TEXAS.

PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 665,287. dated January 1, 1901.

Application filed August 25, 1900. Serial No. 28,029. (No model.)

To all whom, it may concern:

Be it known that I, FRANK TYSON, a citizen of the United States, residingin Philadelphia, Pennsylvania, have invented certain Improvements in Paper Bags, of which the following is a specification.

The object of my invention is to form a satchel-bottomed bellows-sided paper bag in such manner as to prevent waste of paper and provide in the final flap of the bag-bottom a single thickness of paper which is cemented not only to the preceding flap, but also to the side flaps formed by the first fold, thereby firmly securing all of the flaps together and forminga tight and secure bottom for the bag.

In the accompanying drawings, Figure l is a view of the blank for my improved bag as the same is cut from a length of bellows-sided tubing. Fig. 2 is a similar view after the making of the first fold in the formation of the bag-bottom. Fig. 3 is a view of the blank after the second of the bottom folds has been made. Fig. 4 is a view of the completed bag, and Fig. 5 is a perspective view of the top or month end of the bag-blank.

The blank 1 for my improved bag is made with tucked or bellows-folded sides 2 2 in the usual way, and the blanks are cut from the tube in such manner that one end of each blankthat is to say, the end which is to form the mouth of the bagis recessed or cutaway in the center, while the opposite end of the blankthat is to say, the end which is to form the bottom of the bagcorrespondingly projects at the center. Thus, as shown in Fig. 1, the central portion of the top ply of the blank is cut away at one end of said blank, as at 3, and projects at the other end of the blank, as at 4, and the bottom ply of the blank is likewise recessed and extended, but to a greater extent, as at 5 and 6, respectively, so that one ply of the bag, at the mouth of the same, can be grasped by the thumb and fingers to facilitate the opening of the bag. The inner portions of the side folds or tucks 2 Of the bag-blank are likewise cut away at the mouth end of the bag, as shown at 7 in Fig. 5, and correspondingly project at the bottom end, as indicated at Sin Fig. 1, this projection of said side tucks or folds performing a certain function when the folding of the bottom is completed, as hereinafter set forth. The bottom ply of the blank has diagonal incisions extending inwardly from its edge, one on each side of the center, as shown by dotted lines at 9 in Fig. 1. The blank being thus prepared, the bagbottom is formed in the following manner: The top ply is turned back upon itself, the fold being on the line a, Fig. 1, the effect of which operation is to reduce the bottom-forming end of the blank to the condition shown in Fig. 2that is to say, to form the backward fold 10, inwardly-folded side flaps 11, and beneath the latter triangular tucks 12, (shown by dotted lines in Fig. 2,) these latter tucks being due to the tucked sides of the blank. The backward fold 10 has a prismatic end portion 13; but the otherwise prismatic shape of the projecting portion 14: the bottom ply of the blank is modified by folding outward the end portions of the side flaps 11, which operation is permitted by the incisions 9, the result being that said projecting portion of the under ply forms a flaring tongue 15, composed of a single thickness of paper. It will be observed that the central portions 16 of the side flaps ll projectinwardly beyond the points of the triangular tucks 12, which are coterminous with the inner folds of the side tucks 2 of the blank, such inward projection of theintermediate portions of the side flaps being due to the projecting ends 8 of the side tucks caused by the peculiar cutting of the ends of the blank and having the effect of strengthening the bottom of the bag to a degree equal to the extent of projection of the portion 16 of the flaps. After the first fold of the bottom has thus been formed paste is applied to the side flaps 11 and tongue 15 at the points 17, 18, and 19, respectively, and the second flap 20 is made by turning over the prismatic portion 13 of the back fold 10 upon the fold-line b, Fig. 2, such second flap 20 being firmly secured to the side flaps 11 by the paste or cement 17. The blank is now in the condition shown in Fig. 3, and the final flap 21 of the bottom is made by turning up the projecting portion 14 of the bottom ply of the blank upon the fold-line d, Fig. 3, the folded portions of the side flaps 11 being secured together by the paste or cement 18 and the tongue being secured partly to the flap 20 and partly to the side flaps 11, the single thickness of paper in the tongue 15 bending snugly around the edges of said flap 20, so as to be secured to the flaps 11 at points close to said edgesa result which would not be possible if the overlapping portion of the final flap 21 was composed of two or more thicknesses of paper. By thus providing the final flap 21 with a tongue consisting of a single thickness of paper, which is secured both to the preceding flap 20 and to the side flaps 11 at points adjacent to the edges of said flap 20, the various overlapping portions of the bottom of the bag are so firmly cemented together that their separation cannot readily be etfected, and no openings are formed through which the contents of the bag, if powdered, can escape, while on the other hand no unnecessary material is employed in the formation of the flaps, and waste of paper is thus prevented.

Having thus described my invention, I claim and desire to secure by Letters Patent l. A bellows-sided bag having a folded bottom with internal triangular tucks, inwardlyfolded side flaps, and two closing-flaps, each overlapping and secured to said side flaps and one overlapping and secured to the other, the side flaps having inwardly-projecting central portions which extend inwardly beyond the points of the triangular tucks, substantially as specified.

2. A bellows-sided bag having a folded bottom with internal triangulartucks, inwardlyfolded side flaps, and two closing-flaps each overlapping and secured to said side flaps; the final closing-flap having a tongue consisting of a single thickness of paper, which overlaps and is secured both to the preceding closing-flap and to the side flaps at points adjacent to the edges of said preceding closingflap, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK TYSON.

Witnesses:

MURRAY 0. BOYER, J os. H. KLEIN. 

